Journal Publications


  1. N. Sharma, G. Diaz. "Heat transfer and flow-pattern formation in a cylindrical cell with partially immersed heating element," American Journal of Heat and Mass Transfer, Vol. 2, No. 1, pp. 31-41, 2015 ( "http://dx.doi.org/10.7726/ajhmt.2015.1003" )
  2. G. Diaz, N. Sharma, E. Leal-Quiros, A. Munoz-Hernandez. "Enhanced hydrogen production using steam plasma processing of biomass: Experimental apparatus and procedure.," Int. Journal of Hydrogen Energy, Vol. 40, pp. 2091-2098, 2015 ( "http://dx.doi.org/10.1016/j.ijhydene.2014.12.049" )
  3. N. Sharma, A. Munoz-Hernandez, G. Diaz, E. Leal-Quiros. "Contact glow discharge electrolysis in the presence of organic waste,"IOP Journal of Physics: Conference Series,, Vol. 591(012056), pp. 1-4, 2015( "http://dx.doi.org/10.1088/1742-6596/591/1/012056" )
  4. A. Robles, V. Duong, A. J. Martin, J. L. Guadarrama and G. Diaz. "Aluminum Minichannel Solar Water Heater Performance under Year-Round Weather Conditions,"Solar Energy, Vol. 110, pp. 356-364, 2014( "http://dx.doi.org/10.1016/j.solener.2014.09.031" )
  5. G. Diaz, E. Leal-Quiros, R.A. Smith, J. Elliott, and D. Unruh. "Syngas generation from organic waste with plasma steam reforming," IOP Journal of Physics: Conference Series,, 511(012081):1-6, 2014. ( "doi:10.1088/1742-6596/511/1/012081" )
  6. V. Duong, G. Diaz "Carbon dioxide as working fluid for medium and high-temperature concentrated solar thermal systems,”AIMS Energy Journal, Vol. 2, No. 1, pp. 99-115, 2014 ( "DOI:10.3934/energy.2014.1.99" )
  7. G. Diaz "Computational investigation of air-heater performance using natural gas, biogas, and syngas as fuels, ASME Journal of Thermal Science and Engineering Applications, Vol. 6, No. 031011, pp. 1-6, 2014 ( "doi:10.1115/1.4026813" )
  8. N. Sharma, G. Diaz, E. Leal-Quiros "Evaluation of contact glow-discharge electrolysis as a viable method for steam generation, Electrochimica Acta, Vol. 108, pp. 330-336, 2013 ( "doi:10.1016/j.electacta.2013.06.108" )
  9. N. Sharma, G. Diaz, E. Leal-Quiros "Electrolyte film evaporation under the effect of externally applied electric field," International Journal of Thermal Sciences, Vol. 68, pp. 119-126, 2013 ( "doi:10.1016/j.ijthermalsci.2013.01.003" )
  10. S.M. Pineda, G. Diaz, "Contribution of an internal heat exchanger to the performance of a liquid desiccant dehumidifier operating near freezing conditions," International Journal of Thermal Sciences, Vol. 50, pp. 2304-2310, 2011 ( "doi:10.1016/j.ijthermalsci.2011.06.003" )
  11. N. Sharma, G. Diaz, "Performance model of a novel evacuated tube solar collector based on minichannels," Solar Energy, Vol. 85, pp. 881-890, 2011 ( "doi:10.1016/j.solener.2011.02.001" )
  12. S.M. Pineda, G. Diaz, C.F.M. Coimbra, "Approximation of transient 1-D conduction in a finite domain using fractional derivatives," ASME Journal of Heat Transfer, Vol. 133, July, 2011 ( "DOI: 10.1115/1.4003544" )
  13. S.M. Pineda and G. Diaz, "Performance of an adiabatic cross-flow liquid desiccant absorber inside a refrigerated warehouse," International Journal of Refrigeration Vol. 34, pp. 138-147, 2011 ( "doi:10.1016/j.ijrefrig.2010.08.005" )
  14. G. Diaz, "Numerical investigation of transient heat and mass transfer in a parallel-flow liquid-desiccant absorber," Heat and Mass Transfer, Vol. 46, pp. 1335-1344, 2010 ( "DOI 10.1007/s00231-010-0665-8").
  15. A. Contreras, G. Diaz, L. Gallardo and R. Loaiza, "Energy ratio analysis of genetically-optimized potato for ethanol production in the Chilean market," Spanish Journal of Agricultural Research, Vol. 8, No. 3, pp. 559-569, 2010.
  16. G. Diaz and A. Campo, "Artificial neural networks to correlate in-tube turbulent forced convection of binary gas mixtures," International Journal of Thermal Sciences, Vol. 48, pp. 1392-1397, 2009.
  17. G. Diaz and C.F.M Coimbra, "Nonlinear dynamics and control of a variable order oscillator with application to the van der Pol equation," Nonlinear Dynamics, Vol. 56, No. 1, pp. 145-157, 2009.
  18. G. Diaz and R. Winston, "Effect of surface radiation on natural convection in parabolic enclosures," Numerical Heat Transfer, Part A, Vol. 53, No. 9, pp. 891-906, 2008.
  19. G. Diaz, "Controllabitity of cross-flow two-phase heat exchangers," International Journal of Heat and Mass Transfer, Vol. 50, pp. 4559-4567, 2007.
  20. G. Diaz, M. Sen, and K.T. Yang, "Effect of Delay in Thermal Systems with Long Ducts," International Journal of Thernal Sciences, Vol. 43, No. 3, pp. 249-254, 2004.
  21. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Stabilization of Thermal Neurocontrollers," Applied Artificial Intelligence, Vol. 18, No. 5, pp. 447-466, 2004.
  22. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Adaptive Neurocontrol of Heat Exchangers," ASME Journal of Heat Transfer, Vol. 123, No. 3, pp. 417-612, 2001.
  23. A. Pacheco-Vega, G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Heat Rate Predictions in Humid Air-Water Heat Exchangers Using Correlations and Neural Networks," ASME Journal of Heat Transfer, Vol. 123, No. 2, pp. 348-354, 2001.
  24. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Dynamic Prediction and Control of Heat Exchangers Using Artificial Neural Networks," International Journal of Heat and Mass Transfer, Vol. 44, No. 9, pp. 1671-1679, 2001.
  25. G. Diaz, J. Schmadl, T. Schutz and M. Sen, "Modeling of Heat Transfer in Free Convection Nucleate Boiling with Artificial Neural Networks, Part II: Single Component," Wissenschaftliche Beitr¨ age, Technische Fachhochschule Wildau, Heft 2, (in German) 2000, pp. 36-42.
  26. G. Diaz, J. Schmadl, T. Schutz and M. Sen, "Modeling of Heat Transfer in Free Convection Nucleate Boiling with Artificial Neural Networks, Part I: Literature Survey," Wissenschaftliche Beitr¨ age, Technische Fachhochschule Wildau, Heft 2, (in German) 2000, pp. 30-35.
  27. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Simulation of Heat Exchanger Performance by Artificial Neural Networks," International Journal of HVAC&R Research, Vol. 5, No. 3, pp.195-208, 1999.

Book Chapters


  1. G. Diaz and C.F.M. Coimbra, Dynamics and control of nonlinear variable order oscillators. Nonlinear Dynamics, Book edited by: Todd Evans, ISNB 978-953-7619-61-9, pp. 129-144, January 2010, INTECH, Croatia. http://www.sciyo.com/articles/show/title/dynamics-and-control-of-nonlinear-variable-order-oscillators
  2. G. Diaz, Numerical analysis of a minichannel solar collector for CO2-based Ranking cycle applications, WIT Transactions on Ecology and the Environment, Vol 121, pp. 23-34, 2009. ISBN: 978-1-84564-191-7, ISSN: 1746-448X (print), ISSN: 1743-3541 (on-line) (See also Conference proceedings: Energy and Sustainability 2009)


Conference Proceedings


  1. A. Munoz-Hernandez, N. Sharma, and G. Diaz. "Dielectric breakdown process for biomass gasification" Accepted in ASME IMECE2014, Montreal, Canada, Nov. 2014 .
  2. V. Duong and G. Diaz. "Performance of an aluminum-based minichannel solar collector for water heating applications" Proceedings of ASES Solar 2014, pages 1-6, San Francisco, CA, July 2014.
  3. A. Munoz-Hernandez, N. Sharma, and G. Diaz. "Temperature distribution profiles inside biomass under dielectric breakdown conditions" Proceedings of EDAS/ICHMT HEFAT 2014, pages 386-392, Orlando, FL, July 2014.
  4. N. Sharma, G. Diaz, and E. Leal-Quiros, "Contact glow discharge electrolysis as an efficient means of generating steam from liquid waste," Proceedings of ASME IMECE2013 Paper # IMECE2013-64062, San Diego, CA, 2013.
  5. G. Diaz, "Experimental characterization of an aluminum-based minichannel solar water heater.," Proceedings of ASME HT2013 Paper # HT2013-17347, Minneapolis, MN, July 2013.
  6. N. Sharma, G. Diaz, and E. Leal-Quiros, "Experimental study of enhanced steam generation through electrolysis in glow discharge mode," Proceedings of ASME IMECE2012 Paper # IMECE2012-88672, Houston, Texas, November 2012.
  7. N. Sharma, G. Diaz, and E. Leal-Quiros, "Externally applied electric field on the thickness of the electric double layer formed in an electrolyte layer and its contribution towards joule heating," Proceedings of ASME IMECE2011, Paper # IMECE2011-63329, Denver CO, November 2011.
  8. G. Diaz, J. Elliott, and C.F.M Coimbra, "Towards zero-net-energy at a community scale level: Case study at UC Merced," Proceedings of ASME ESFuelCell2011, Washington DC, August 2011.
  9. G. Diaz, E. Leal-Quiros, R.A. Smith, J. Elliott, and D. Unruh, "Syngas generation from organic waste with plasma steam reforming," Proceedings of International Conference on Plasma Physics (ICPP), Latin American Workshop on Plasma Physics, (LAWPP), (ICPP-LAWPP 2010), pages 1–6, Santiago, Chile, 2010.
  10. V.M. Emmerson, G. Diaz, "Experimental characterization of a small-scale downdraft gasifier for biomass waste," Proceedings of ASME IMECE 2010, Paper # IMECE2010-37392, November, Vancouver, Canada, 2010.
  11. G. Diaz, E. Leal-Quiroz, R.A. Smith, J. Elliott, D. Unruh, "Syngas generation from organic waste with plasma steam reforming," Proceedings of 15th International Congress on Plasma Physics (ICPP 2010), August 2010, Santiago, Chile, 2010.
  12. S.M. Pineda, G. Diaz, "Analysis of heat and mass transfer of an adiabatic cross-flow liquid desiccant absorber operating at low temperature," Proceedings of ASME Summer Heat Transfer Conference, Paper # HT2009-88255, pp. 1-9, San Francisco, July, 2009.
  13. G. Diaz, "Numerical analysis of a minichannel solar collector for CO2-based Ranking cycle applications," Proceedings of Second International Conference on Energy and Sustainability, pp. 23-34, Bologna, Italy, 2009.
  14. G. Diaz, "Performance Analysis and Design Optimization of a Mini-channel Evacuated-tube Solar Collector," Proceedings of ASME IMECE 2008, Paper # IMECE2008-67858, Boston, MA, Nov. 2008.
  15. G. Diaz, "Performance Improvement of a CO2 Combined Cooling, Heating, and Power Cycle Using Solar Thermal Collectors," Proceedings of SOLAR 2008, San Diego, CA, May 2008, Paper # 0238, pp. 1-6.
  16. G. Diaz, A. Campo, "Turbulent forced convection correlation for the in-tube flow of binary gas mixtures with 0.1 < Pr < 0.7," Proceedings of the ASME-JSME Thermal Engineering Conference and Summer Heat Transfer Conference, Vancouver, BC, Canada (July 2007), Paper # HT2007-32355, pp. 1-6.
  17. R. Winston, G. Diaz, A. Ritchel, A. Tovar, J. Cisneros, R. Gee, M. J. Hale, S. Horne, X. Jiang, R. Radhakrishnan and J. Zhang, High temperature CPC collectors with chinese vacuum tube receivers. Proceedings of the ISES World Congress 2007 (Vol. I - Vol. V), pp. 661-662 Springer Berlin Heidelberg, 10.1007/978-3-540-75997-3, 978-3-540-75996-6 (Print) 978-3-540-75997-3 (Online).
  18. G. Diaz, R. Winston, P. Benitez, A. Ritschel, S. Pineda, "Analysis of natural convection coupled with thermal radiation in novel high concentration nonimaging-optics-based system for multi-junction solar cells," Proceedings of the ASME IMECE, Paper number IMECE2006-14178, Chicago, IL, 2006.
  19. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Stabilization of a neural network-based temperature controller for heat exchangers," Proceedings of the 12th International Heat Transfer Conference, Grenoble, France, Volume 4, pp. 25-230, 2002.
  20. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "On-line training of artificial neural networks for control of a heat exchanger test facility," Proceedings of the ASME NHTC'01, Anaheim, California, Volume 10, pp. 359-365, 2001.
  21. G. Diaz, M. Sen and R.L. McClain, "Adaptive neurocontrol and minimization of energy consumption of a heat exchanger test facility," Proceedings of the ASME IMECE, HTD-Vol.366-3, Heat Transfer Division-2000, pp. 111-116, November 5-10, 2000.
  22. K. T. Yang, Mihir Sen, Gerardo Diaz, Arturo Pacheco-Vega, and Rodney L. Mc-Clain, "Coeffcient of Heat Transfer in Fin-Tube Heat Exchanger Analysis and the Artificial Neural Networks," Proceedings of the Symposium on Energy Engineering in the 21th Century (SEE 2000), ed. Ping Cheng, Vol. 3, pp. 940-948, Begell House Publishers, NY, USA.
  23. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Use of artificial neural networks for temperature control in heat exchangers," Proceedings of the Fourth ISHMT-ASME Heat and Mass Transfer Conference and Fifteenth National Heat and Mass Transfer Conference, (Eds.) M.S. Loknath, S.P. Venkateshan, B.V.S.S.S. Prasad, B. Basu, V. Prasad, Jan. 12-14, 2000, Pune, India, pp. 963-968.
  24. G. Diaz, M. Sen, K.T. Yang, R.L. McClain, "Artificial Neural Network Control of an Experimental Heat Exchanger Facility," Proceedings of the ASME Heat Transfer Division-1999, 1999 ASME International Mechanical Engineering Congress and Exposition, HTD Vol. 364-4, 1999, pp. 325-330.
  25. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Neurocontrol of Heat Exchangers (in Spanish)," Proceedings of the Fourth International Meeting of Mechanical Engineering, San Luis Potosi, Mexico, pp. 123-128, 1998.
  26. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Artificial Neural Network Simulation of the Dynamic Behavior of Heat Exchangers," Proceedings of the Seventh Latin American Heat and Mass Transfer Conference, Vol. 1, pp. 23-28, 1998.
  27. G. Diaz, S. Basu, M. Sen, K.T. Yang and R.L. McClain, "Effect of Delay in Heating and Cooling Systems," Eurotherm No. 53, Advanced Concepts and Techniques in Thermal Modeling, 1997.
  28. G. Diaz, J.A. Yanes, M. Sen, K.T. Yang and R.L. McClain, "Analysis of Data from Single-Row Heat Exchanger Experiments Using an Artificial Neural Network," Proceedings of the ASME Fluids Engineering Division, International Mechanical Engineering Congress and Exhibition, Atlanta, GA, FED-Vol. 242, American Society of Mechanical Engineering, New York, NY, pp. 45-52, 1996.
  29. Moraga, N., Diaz, G., and Aedo, A., "Analysis of Heat Conduction for Food Freezing by Space-Time Finite Element Method," Proceedings of the VI Latinamerican Congress of Heat and Mass transfer, Florianopolis SC, Brazil, Vol. II, pp. 813-816, 1996.
  30. Moraga, N. and Diaz, G., "Bidimensional thermal simulation of cylindric aluminum castings by the finite difference method (in Spanish)," Proceedings of the XII Jornadas de Transferencia de Calor y Materia, Santiago, Chile. pp. 105-111, 1994.
  31. Moraga, N. and Diaz, G., "Study on transient heat conduction by the space-time formulation of the finite element method (in Spanish)," Proceedings of the XI Jornadas de Transferencia de Calor y Materia, Temuco, Chile. pp. 40-45, 1993.

Poster Sessions


  1. G. Diaz, E. Leal-Quiros, "Sustainable waste management using plasma gasifcation at the campus of the University of California - Merced," XXIX International Conference on Phenomena in Ionized Gases (ICPIG), Cancun, Mexico July 2009..
  2. P. Benitez, R. Winston, G. Diaz, L. Reed, J. Cisneros, A. Tovar-Fonseca, A. Ristchel, J. Wright, "Novel high-concentration mirror-based Kohler integrating system for tandem solar cells," IEEE 4th World Conference on Photovoltaic Energy Conversion, Hawaii, 2006.
  3. G. Diaz, M. Sen, K.T. Yang and R.L. McClain, "Simulation of Heat Exchanger Performance by Artificial Neural Networks," ASHRAE Winter Meeting, Dallas, TX, Feb. 2000.
  4. G. Diaz, S. Basu, M. Sen, K.T. Yang and R.L. McClain, "Effect of Delay in Heating and Cooling Systems," Eurotherm No. 53, Advanced Concepts and Techniques in Thermal Modeling, pp. 41-42, 1997.